TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-S, Operating Manual

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MULTITOX DETECTOR
OPERATING MANUAL
40 NOSP17668
Revision 03
a
6.8.2.2 Calibration
Calibration must be made with the gas the detector is set to detect, with the SET menu (F2 key) of
the wireless communication tool TLU600 and a calibration kit.
The calibration gas should be injected at a flow rate between 30 l/h and 60 l/h. For the DGi-
TT7-O version, on a 25%vol scale, ambient air at 21%vol O
2
generally fits.
For DG-TT7-S series, it is necessary to have a humidifier tube into the gas circuit. Use the specific
calibration kit.
Open the flow regulator (0.5 l / min), wait for stabilization (about 2-3 min)
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and calibrate.
If one wants to carry out another bump test or calibration and expect an accurate measurement,
a 60 minutes clean air recovery is considered as a minimum interval. This interval increases up to
90 minutes if the gas exposure has been about 5 minutes and extended to, at least, 2 hours if the
gas exposure has exceeded 5 min.
NB : The humidifier tube provided in the calibration kit has to be change when the color becomes
dark brown
For DG-TT7-S versions, the H
2
S mixture must be in air and not in nitrogen
otherwise a significant calibration error is made
The detector is in maintenance inhibition mode for 10 minutes after it goes back to main screen.
Use the setting menu and validate the INH command for acknowledgement.
To end of communication between the TLU6000 and the detector is done by pressing F4 key on
main menu.
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When the splash guard (AS019) is used with the calibration cup, stabilization time increases
slightly (approximately 1 minute) during an injection with cup.